Audio listening system



FIG. 1 is a front right perspective view of an audio listening system showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a bottom view thereof.

The broken lines in the figures show portions of the audio listening system that form no part of the claimed design. 

CLAIM The ornamental design for an audio listening system, as shown and described. 